diff --git a/doc/src/sgml/auth-delay.sgml b/doc/src/sgml/auth-delay.sgml
index b91a7ecda7a..e377c980cab 100644
--- a/doc/src/sgml/auth-delay.sgml
+++ b/doc/src/sgml/auth-delay.sgml
@@ -17,7 +17,7 @@
  </para>
 
  <para>
-  In order to function, this module must be loaded via 
+  In order to function, this module must be loaded via
   <xref linkend="guc-shared-preload-libraries"> in <filename>postgresql.conf</>.
  </para>
 
diff --git a/doc/src/sgml/datatype.sgml b/doc/src/sgml/datatype.sgml
index ab8eb2d30bb..0cba6587587 100644
--- a/doc/src/sgml/datatype.sgml
+++ b/doc/src/sgml/datatype.sgml
@@ -3875,7 +3875,7 @@ SELECT to_tsvector( 'postgraduate' ) @@ to_tsquery( 'postgres:*' );
  t
 (1 row)
 </programlisting>
-     because <literal>postgres</> gets stemmed to <literal>postgr</>: 
+     because <literal>postgres</> gets stemmed to <literal>postgr</>:
 <programlisting>
 SELECT to_tsquery('postgres:*');
  to_tsquery 
diff --git a/doc/src/sgml/high-availability.sgml b/doc/src/sgml/high-availability.sgml
index 0d3baa04bcd..bb787dc396d 100644
--- a/doc/src/sgml/high-availability.sgml
+++ b/doc/src/sgml/high-availability.sgml
@@ -872,7 +872,7 @@ primary_conninfo = 'host=192.168.1.50 port=5432 user=foo password=foopass'
      <literal>pg_stat_replication</></link> view. Large differences between
      <function>pg_current_xlog_location</> and <literal>sent_location</> field
      might indicate that the master server is under heavy load, while
-     differences between <literal>sent_location</> and 
+     differences between <literal>sent_location</> and
      <function>pg_last_xlog_receive_location</> on the standby might indicate
      network delay, or that the standby is under heavy load.
     </para>
diff --git a/doc/src/sgml/install-windows.sgml b/doc/src/sgml/install-windows.sgml
index 439f5ad82b2..bc2ed012f44 100644
--- a/doc/src/sgml/install-windows.sgml
+++ b/doc/src/sgml/install-windows.sgml
@@ -49,8 +49,8 @@
   <xref linkend="installation-notes-mingw"> and <xref linkend="installation-notes-cygwin">.
   To produce native 64 bit binaries in these environments, use the tools from
   <productname>MinGW-w64</productname>. These tools can also be used to
-  cross-compile for 32 bit and 64 bit <productname>Windows</productname> 
-  targets on other hosts, such as <productname>Linux</productname> and 
+  cross-compile for 32 bit and 64 bit <productname>Windows</productname>
+  targets on other hosts, such as <productname>Linux</productname> and
   <productname>Darwin</productname>.
   <productname>Cygwin</productname> is not recommended for running a
   production server, and it should only be used for running on
@@ -61,7 +61,7 @@
  </para>
 
  <para>
-  Native builds of <application>psql</application> don't support command 
+  Native builds of <application>psql</application> don't support command
   line editing. The <productname>Cygwin</productname> build does support
   command line editing, so it should be used where psql is needed for
   interactive use on  <productname>Windows</productname>.
diff --git a/doc/src/sgml/pgupgrade.sgml b/doc/src/sgml/pgupgrade.sgml
index 5d605e187e8..8ea9c270120 100644
--- a/doc/src/sgml/pgupgrade.sgml
+++ b/doc/src/sgml/pgupgrade.sgml
@@ -294,7 +294,7 @@ NET STOP pgsql-8.3  (<productname>PostgreSQL</> 8.3 and older used a different s
      <application>pg_upgrade</> requires the specification of the old and new cluster's
      data and executable (<filename>bin</>) directories. You can also specify
      user and port values, and whether you want the data linked instead of
-     copied (the default). 
+     copied (the default).
     </para>
 
     <para>
diff --git a/doc/src/sgml/ref/drop_foreign_table.sgml b/doc/src/sgml/ref/drop_foreign_table.sgml
index 9a9624b1873..1f66126a335 100644
--- a/doc/src/sgml/ref/drop_foreign_table.sgml
+++ b/doc/src/sgml/ref/drop_foreign_table.sgml
@@ -21,7 +21,7 @@
 DROP FOREIGN TABLE [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceable> [, ...] [ CASCADE | RESTRICT ]
 </synopsis>
  </refsynopsisdiv>
- 
+
  <refsect1>
   <title>Description</title>
 
@@ -30,7 +30,7 @@ DROP FOREIGN TABLE [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceabl
    Only the owner of a foreign table can remove it.
   </para>
  </refsect1>
-  
+
  <refsect1>
   <title>Parameters</title>
 
@@ -80,14 +80,14 @@ DROP FOREIGN TABLE [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceabl
   <title>Examples</title>
 
   <para>
-   To destroy two foreign tables, <literal>films</literal> and 
+   To destroy two foreign tables, <literal>films</literal> and
    <literal>distributors</literal>:
 
 <programlisting>
 DROP FOREIGN TABLE films, distributors;
 </programlisting></para>
  </refsect1>
- 
+
  <refsect1>
   <title>Compatibility</title>
 
diff --git a/doc/src/sgml/ref/postgres-ref.sgml b/doc/src/sgml/ref/postgres-ref.sgml
index bd4ae338f73..b16bbdfa4b3 100644
--- a/doc/src/sgml/ref/postgres-ref.sgml
+++ b/doc/src/sgml/ref/postgres-ref.sgml
@@ -745,7 +745,7 @@ PostgreSQL documentation
 
    <para>
     Note that the single-user mode server does not provide sophisticated
-    line-editing features (no command history, for example). 
+    line-editing features (no command history, for example).
     Single-User mode also does not do any background processing, like
     automatic checkpoints.
 
diff --git a/doc/src/sgml/sepgsql.sgml b/doc/src/sgml/sepgsql.sgml
index fa42c191a16..fc379885d8b 100644
--- a/doc/src/sgml/sepgsql.sgml
+++ b/doc/src/sgml/sepgsql.sgml
@@ -147,7 +147,7 @@ $ for DBNAME in template0 template1 postgres; do
    Second, build and install the policy package for the regression test.
    The <filename>sepgsql-regtest.pp</> is a special purpose policy package
    which provides a set of rules to be allowed during the regression tests.
-   It should be built from the policy source file 
+   It should be built from the policy source file
    (<filename>sepgsql-regtest.te</>), which is normally done using
    <command>make</command>.  You will need to locate the appropriate
    Makefile on your system; the path shown below is only an example.